What does 'lo' mean on a car?

[Neil]

lo stands for low. This symbol is found on the temperature control knob of the car's air conditioning control panel, where the 'lo' direction indicates lowering the air conditioning temperature. More information about car air conditioning is as follows: 1. The car's air conditioning can both cool and heat. When cooling, the compressor clutch engages, and the engine drives the compressor to operate. During operation, the compressor continuously compresses the refrigerant and sends it to the evaporator. 2. The refrigerant expands inside the evaporator, absorbing heat and cooling the evaporator. The cooled evaporator then cools the air blown by the blower, allowing the car's air conditioning vents to blow cold air.